Fanshim noise when mounted on Pi Mounted on Pibow Touchscreen Frame

Support
1

I’ve mounted my fanshim and it’s lovely when sitting flat on the Pi sitting flat on a table.

However, if I rotate the Pi quite a strong noise comes from the pan when it reaches past 90 degrees, and sitting on the back of the Pibox Screen frame it’s making quite a bad noise.

Should these fans work silently when running “upside down”?

2

I think I have heard one or two similar complaints. If you have a spare female header kicking around, try plugging that in on top of it. It may hold it down firmly and stop the buzz.

3

Mine don’t make any noise in any position ,even upside down I have it in this case ,no header,

4

I have one on the Pi 4 in my SmartiPi case tilted vertical and it’s quiet. I have another one that buzzed no matter what way it was. Both are soldered to female headers.
There is a replacement for the noisy one on the way. It will be a few days before I get to play with it though.

5

It’s most likely the motor bearings. Fans like these prefer to run horizontally with the blades on top (label down). So any looseness will show up in another orientation. I bought some cheap 1" fans ($2.50 each) and one of them buzzes if I run it vertically but runs fine horizontally.